Product Review

The ink is not black, is gray, and a bit light at that, almost like a #2 pencil,
so it beats the purpose of needing an erasable pen. If it were darker (a lot
more!), it would be great. In other colors the concept works great.
Also, for being a 0.5mm, the lines are more like 0.7mm. So, this pen is in my
opinion a Gray 0.7mm Pen. Or a liquid #2 HB.
This particular pen is preferable to the capped one, better and more streamlined
design.